quadrate
n
1 a cube, square, or a square or cubelike object
2 one of a pair of bones of the upper jaw of fishes, amphibians, reptiles, and birds that articulates with the lower jaw. In mammals it forms the incus
adj
3 of or relating to this bone
4 square or rectangular
vb
5 tr to make square or rectangular
6 often foll by: with to conform or cause to conform
(C14: from Latin quadrare to make square)